I don't know if this is the correct category for my question but I have a question about the load time of the web interface.

After a couple of minutes the loading time of the mobile interface increases drastically. The interface hangs for about 2 or 3 seconds at 20%. I installed GPSGate in a Server 2016 installation and prior to this change I used Win 8.1 and didn't encounter such load times that time. Is there a specific setting in IIS or MySQL that has to be changed? I don't know where to look. I allready set the idle timeout for GpsGateServer in the application pool to zero with no avail.
web addres is: tracking.gpsforce.eu
Thanks in advance,

Do you think it depends on ISP? I've got a small amount of customers and they (I assume) never use the mobile app because they use the tracker for trip logs only. But when I log in after a day it stays long at 20%. When I logout and log back in after 5 minutes it's amazingly fast. Strange.